Hi Dr Wazir ali Hangu . You simply add JOI to water, at a ratio of 1 tablespoon JOI to one 1 cup of water, and mix in a blender for 30 seconds. If you don't use all your nut milk in one sitting, it will keep in an airtight container (like a lidded Mason jar) for about 8 days in the fridge. See the following link:https://www.myrecipes.com/ingredients/joi-shelf-stable-almond-milk